Laravel 5.2 testing always returning 404

guys,

I'm having this issue to create my firsts tests on my project. I already try almost everything, search in forums, but I can't resolve this problem. Every page that I try to access using get in my test is always returning 404.

public function testExample()
{
    $user = factory(User::class)->make();
    $this->actingAs($user)->get('/book-original');
    $this->assertResponseOk();
}

There was 1 failure:

1) FileTest::testExample Expected status code 200, got 404.

I'm using a separeted .env.testing file, but try to setup my .env file same as the testing, in case the Laravel is ignoring the testing and reading the main one, but the result is the same.

I try to use the $baseUrl and .env's APP_URL with http://localhost and my IP and try to use the return value from php artisan serve command, in my case, http://localhost:8000, but in both cases the error persists.

Important: I used php artisan config:cache every time I changed the configs.

I'm already lost. Has someone a hint to help here?

Thanks so much.